Company lists · Data refreshed September 2026

Top 25 Telecommunications infrastructure providers based in Germany

Name: Telecommunications infrastructure providers based in Germany
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 654 companies tracked

RevenueBase identified 654 telecommunications infrastructure providers headquartered in Germany as of September 2026 and tracks 13,373 professional contacts across them, including 6,144 with verified work emails. Berlin is the largest hub.

This list covers telecommunications infrastructure providers headquartered in Germany, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 19, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 19, 2026 86% judged on-target in blind review

654Companies

13,373Contacts tracked

6,144Verified emails

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The 25 largest telecommunications infrastructure providers based in Germany

Ranked by team size

Top 25 of 654 telecommunications infrastructure providers based in Germany, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to telecommunications infrastructure providers: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Deutsche Glasfaser Unternehmensgruppe	Indirect evidence	Düsseldorf, GermanyHQ checked Sep 19, 2026	1,001-5,000	1,086 contacts →
	Indirect evidence “Wir sind der Digital-Versorger für das private, soziale, wirtschaftliche und öffentliche Leben in den Regionen.” Source: RevenueBase Database · checked Sep 19, 2026
2	1&1 Versatel	Indirect evidence	Düsseldorf, GermanyHQ checked Sep 19, 2026	1,001-5,000	863 contacts →
	Indirect evidence “1 & 1 Versatel - Der deutsche Glasfaserspezialist 1 & 1 Versatel ist als Telekommunikationsspezialist für Firmenkunden einer der führenden Anbieter von Daten, Internet- und…” Source: RevenueBase Database · checked Sep 19, 2026
3	Vantage Towers	Indirect evidence	Düsseldorf, GermanyHQ checked Sep 19, 2026	501-1,000	668 contacts →
	Indirect evidence “Vantage Towers is one of Europe’s leading tower companies.” Source: RevenueBase Database · checked Sep 19, 2026
4	M-Net Telekommunikations Gmbh	Indirect evidence	München, GermanyHQ checked Sep 19, 2026	501-1,000	443 contacts →
	Indirect evidence “Als führender Glasfaseranbieter Bayerns verbindet M-net seit 1996 Menschen und Unternehmen in Bayern, im Großraum Ulm und im hessischen Main-Kinzig-Kreis mit zuverlässiger…” Source: RevenueBase Database · checked Sep 19, 2026
5	Deutsche Giganetz Gmbh	Indirect evidence	Hamburg, GermanyHQ checked Sep 19, 2026	501-1,000	438 contacts →
	Indirect evidence “Die Deutsche GigaNetz GmbH mit Hauptsitz in Hamburg betreibt in Deutschland einen qualitätsorientierten Glasfasernetzausbau bis in die eigenen vier Wände (FttH – Fiber To The…” Source: RevenueBase Database · checked Sep 19, 2026
6	Axians Germany	Indirect evidence	Frankfurt Am Main, GermanyHQ checked Sep 19, 2026	1,001-5,000	403 contacts →
	Indirect evidence “AXIANS is the corporate brand for network infrastrucutures and corporate communications of VINCI Energies, one of the leading European providers of energy and information…” Source: RevenueBase Database · checked Sep 19, 2026
7	Plusnet Gmbh	Indirect evidence	Köln, GermanyHQ checked Sep 19, 2026	201-500	248 contacts →
	Indirect evidence “Die Plusnet GmbH, eine Tochtergesellschaft der EnBW, ist ein deutsches Telekommunikationsunternehmen mit Fokus auf Geschäftskunden.” Source: RevenueBase Database · checked Sep 19, 2026
8	Cteam Consulting & Anlagenbau Gmbh	Indirect evidence	Ummendorf, GermanyHQ checked Sep 19, 2026	1,001-5,000	220 contacts →
	Indirect evidence “Competence die verbindet: Teamgeist, Kundenfokus & starke Leistung für Netzlösungen in der Energie- & Telekommunikationsbranche.” Source: RevenueBase Database · checked Sep 19, 2026
9	OXG Glasfaser Gmbh	Indirect evidence	Düsseldorf, GermanyHQ checked Sep 19, 2026	201-500	209 contacts →
	Indirect evidence “Die Glasfaser-Expert*innen: Wir von der OXG Glasfaser GmbH bauen und betreiben ein schnelles und zuverlässiges Glasfaser-Netz in Deutschland.” Source: RevenueBase Database · checked Sep 19, 2026
10	Sipgate	Indirect evidence	Düsseldorf, GermanyHQ checked Sep 19, 2026	201-500	201 contacts →
	Indirect evidence “Founded in 2004, we at sipgate were the first German VoIP provider and have been developing internet and telephony services ever since.” Source: RevenueBase Database · checked Sep 19, 2026
11	Phoenix Engineering	Partial evidence	Cologne, GermanyHQ checked Sep 19, 2026	501-1,000	181 contacts →
	Partial evidence “Phoenix Engineering Group is the leader in the field of broadband technologies and infrastructure.” Source: RevenueBase Database · checked Sep 19, 2026
12	Insyte Deutschland Gmbh	Indirect evidence	Ratingen, GermanyHQ checked Sep 19, 2026	201-500	177 contacts →
	Indirect evidence “Bei Insyte Deutschland arbeiten wir daran, unseren Kunden qualitativ hochwertige Dienstleistungen im Bereich der Installation, des Betriebs und der Wartung von Netzwerken und…” Source: RevenueBase Database · checked Sep 19, 2026
13	Netcom BW Gmbh	Indirect evidence	Ellwangen (jagst), GermanyHQ checked Sep 19, 2026	201-500	161 contacts →
	Indirect evidence “Schnelles Internet für die Region #vernetzt - mit Highspeed in Verbindung bleiben Die NetCom BW GmbH mit Sitz in Ellwangen wurde 2014 gegründet und ist eine Konzerngesellschaft…” Source: RevenueBase Database · checked Sep 19, 2026
14	DNS NET Internet Service Gmbh	Indirect evidence	Berlin, GermanyHQ checked Sep 19, 2026	201-500	145 contacts →
	Indirect evidence “Menschen mit Lichtgeschwindigkeit begeistern – das ist die Vision, die die rund 250 Mitarbeiter:innen der DNS:NET Familie antreibt.” Source: RevenueBase Database · checked Sep 19, 2026
15	Itenos Gmbh	Partial evidence	Bonn, GermanyHQ checked Sep 19, 2026	201-500	143 contacts →
	Partial evidence “ITENOS, headquartered in Bonn, Germany, is an experienced specialist for secure IT and telecommunications solutions.” Source: RevenueBase Database · checked Sep 19, 2026
16	Circet Deutschland SE	Indirect evidence	Bergisch Gladbach, GermanyHQ checked Sep 19, 2026	1,001-5,000	134 contacts →
	Indirect evidence “WER WIR SIND Die Circet Deutschland SE ist ein Unternehmen der Circet Group, dem führenden weltweiten Dienstleister für den Aufbau und die Wartung von…” Source: RevenueBase Database · checked Sep 19, 2026
17	Rosenberger-Osi Gmbh & Co. OHG	Partial evidence	Augsburg, GermanyHQ checked Sep 19, 2026	501-1,000	125 contacts →
	Partial evidence “Since 1991, Rosenberger Optical Solutions & Infrastructure (Rosenberger OSI) has been a recognized expert for fiber-based connectivity, cabling solutions and infrastructure…” Source: RevenueBase Database · checked Sep 19, 2026
18	Glasfaser Nordwest Gmbh & Co. KG	Indirect evidence	Oldenburg, GermanyHQ checked Sep 19, 2026	201-500	119 contacts →
	Indirect evidence “Together for the future of the internet: Glasfaser Nordwest is the joint venture between EWE and Telekom.” Source: RevenueBase Database · checked Sep 19, 2026
19	Mugler SE	Indirect evidence	Oberlungwitz, GermanyHQ checked Sep 19, 2026	501-1,000	115 contacts →
	Indirect evidence “Bei der MUGLER SE dreht sich alles um Telekommunikation.” Source: RevenueBase Database · checked Sep 19, 2026
20	MRK	Indirect evidence	München, GermanyHQ checked Sep 19, 2026	201-500	101 contacts →
	Indirect evidence “Digitalisierungsstrategien, Glasfaserausbau, 5G-Netze und Energiewende: Wir bringen uns aktiv für die Zukunft ein.” Source: RevenueBase Database · checked Sep 19, 2026
21	Netzkontor Nord Gmbh	Indirect evidence	Flensburg, GermanyHQ checked Sep 19, 2026	201-500	95 contacts →
	Indirect evidence “Die netzkontor nord gmbh mit Standorten in Erfurt, Flensburg, Lübeck, Neumünster, Schwerin und Wipperfürth, gehört zur bundesweittätigen Netzkontor GmbH und stellt eines der…” Source: RevenueBase Database · checked Sep 19, 2026
22	Envia TEL Gmbh	Indirect evidence	Markkleeberg, GermanyHQ checked Sep 19, 2026	201-500	94 contacts →
	Indirect evidence “Die envia TEL GmbH ist der führende regionale Telekommunikationsdienstleister und Netzbetreiber in Mitteldeutschland.” Source: RevenueBase Database · checked Sep 19, 2026
23	Aconnic	Indirect evidence	Munich, GermanyHQ checked Sep 19, 2026	201-500	94 contacts →
	Indirect evidence “aconnic has emerged from the UET Group and its operating companies and brands including albis-elcon, SUCONI, Albis Engineering and Albis Technologies.” Source: RevenueBase Database · checked Sep 19, 2026
24	Xantaro	Indirect evidence	Köln, GermanyHQ checked Sep 19, 2026	51-200	93 contacts →
	Indirect evidence “Xantaro specializes in technologies, software and services for Carriers, ISPs, Hosting and Cloud Providers as well as for Operators of Data Centres and Campus Networks.” Source: RevenueBase Database · checked Sep 19, 2026
25	Telemaxx Telekommunikation Gmbh	Indirect evidence	Karlsruhe, GermanyHQ checked Sep 19, 2026	51-200	89 contacts →
	Indirect evidence “TelemaxX betreibt vier Hochsicherheits-Rechenzentren in Karlsruhe und bietet maßgeschneiderte Lösungen in den Bereichen #Rechenzentrumsflächen,#Housing und Managed Services.” Source: RevenueBase Database · checked Sep 19, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: telecommunications infrastructure providers. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names telecommunications infrastructure providers.
Partial evidence: Its own public description names part of telecommunications infrastructure providers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name telecommunications infrastructure providers. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 654 telecommunications infrastructure providers based in Germany

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Telecommunications infrastructure providers based in Germany at a glance

As of Sep 19, 2026

45.9%Verified-email coverage

20.4Average contacts per company

11-50Median size (employees)

5.8%Largest-city concentration · Berlin

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

231

11-50

213

51-200

129

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for Germany, so it is reported there. Company counts and contact totals on this page are exact for Germany, over 654 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among telecommunications infrastructure providers, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Germany whose own description of what they do matches “telecommunications infrastructure providers”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names telecommunications infrastructure providers), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among telecommunications infrastructure providers, and records with no verified work email. Companies headquartered outside Germany are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 6,144 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 19, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Telecommunications infrastructure providers by metro

Telecommunications infrastructure providers in Berlin38

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names telecommunications infrastructure providers, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many telecommunications infrastructure providers are there based in Germany?

RevenueBase identified 654 telecommunications infrastructure providers headquartered in Germany as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Deutsche Glasfaser Unternehmensgruppe, headquartered in Dusseldorf, tops this list with the largest team on record.

Which city has the most telecommunications infrastructure providers?

Berlin leads with 38 headquartered companies, followed by Hamburg (24) and Dusseldorf (17).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 6,144 verified decision-maker contacts tracked across these 654 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 19, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.